A residential building with a 10,000 square foot area and a 100A service requires a generator. What is the minimum size generator required?
- A15kW
- B20kW
- 25kW
- D30kW
Exam tip
Always round up to the next standard size generator when calculating the minimum required size.
Why C is correct
According to the NEC, the minimum generator size is calculated as 125% of the service load. For a 100A service, this is 125A * 120V = 15,000W. Therefore, a 25kW generator is the minimum required size to cover the load.